Skip to main content

Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Effects of low bondability of acetylated fibers on mechanical properties and dimensional stability of fiberboard

Abstract

Fiberboards were prepared from acetylated fibers with various weight gains: 0, 4.7, 9.4, 18.5, and 24.8 weight percent gain (WPG). The effects of low bondability of acetylated fibers on mechanical properties and dimensional changes were determined. The decreased mechanical properties of acetylated fiberboard are mainly due to low bondability. To improve bending strength, high face density is also needed. The thickness swelling according to JIS and the linear expansion under relative humidity changes decreased with increasing WPG. As for accelerated weathering and the outdoor exposure test, the thickness changes in 4.7–18.5 WPG boards were much higher than those in OWPG board and 24.8 WPG board. The high thickness change in 4.7–18.5 WPG boards is due to low bondability. Although 24.8 WPG board also has low bondability, the thickness change of 24.8 WPG board decreased. The high dimensional stability of acetylated fibers, caused by high WPG, probably outweighs the dimensional change caused by low bondability. On the other hand, during the boiling test the thickness changes in 24.8 WPG board and the 4.7–18.5 WPG boards were higher than those in 0 WPG board. The effect of the boiling test on the boards is more severe than that seen with the accelerated weathering and outdoor exposure test; therefore, the effects of the low bondability probably cancel the effects of the high WPG. It is necessary to increase the bondability of acetylated fibers to improve the dimensional stability and the mechanical properties.

References

  1. 1.

    Rowell RM, Youngquist JA, Rowell JS, Hyatt JA (1991) Dimensional stability of Aspen fiberboard made from acetylated fiber. Wood Fiber Sci 23:558–566

    CAS  Google Scholar 

  2. 2.

    Yoshida Y, Kawai S, Imamura Y, Nishimoto K, Satou T, Nakaji M (1986) Production technology for acetylated low-density particleboard. I. Mechanical properties and dimensional stability (in Japanese). Mokuzai Gakkaishi 32:965–971

    Google Scholar 

  3. 3.

    Kiguchi M, Suzuki M (1985) Physical properties of particleboard with acetylated chips and binder (in Japanese). Mokuzai Gakkaishi 31:200–208

    CAS  Google Scholar 

  4. 4.

    Subiyanto B, Yusuf S, Kawai S, Imamura Y (1989) Particleboard from acetylatedAlbizzia particles. I. The effect of acetyl weight gain on mechanical properties and dimensional stability. Mokuzai Gakkaishi 35:412–418

    CAS  Google Scholar 

  5. 5.

    Rowell RM, Imamura Y, Kawai S, Norimoto M (1989) Dimensional stability, decay resistance, and mechanical properties of veneer-faced low-density particleboards made from acetylated wood. Wood Fiber Sci 21(1):67–79

    CAS  Google Scholar 

  6. 6.

    Imamura Y (1989) High-durable particleboards by chemical modification (in Japanese). Wood Ind 44:634–636

    CAS  Google Scholar 

  7. 7.

    Wong ED, Zhang M, Wang Q, Kawai S (1998) Effects of mat moisture content and press closing speed on the formation of density profile and properties of particleboard. J Wood Sci 44:287–295

    CAS  Article  Google Scholar 

  8. 8.

    Maloney TM (1977) Modern particleboard & dry process fiberboard manufacturing. Miller Freeman, San Francisco, pp 520–522

    Google Scholar 

  9. 9.

    Sugiyama M, Norimoto M (1996) Temperature dependence of dynamic viscoelasticities of chemically treated woods (in Japanese). Mokuzai Gakkaishi 42:1049–1056

    CAS  Google Scholar 

  10. 10.

    Hayashi T, Miyatake A, Kawai S (2000) Effects of outdoor exposure on the strength distribution of oriented strand board (OSB) and particle board (in Japanese). J Soc Mater Sci Jpn 49:384–389

    CAS  Article  Google Scholar 

  11. 11.

    Sekino N, Suemastu A, Yasui E (1998) In-plane dimensional stability of wood-based panel products. Part I. Hygroscopic linear expasion of commercially made panels (in Japanese). Wood Ind 53:408–412

    Google Scholar 

  12. 2.

    Sudou S (1997) World timbers in colour (in Japanese). Sun choh Shuppan, Tokyo, p 168

    Google Scholar 

  13. 13.

    Korai H, Kiguchi M, Hosoya S, Iwata R, Hirano Y, Suzuki S (2001) Improvement of fiberboard made from acetylated fibers by ozonation I: effect of ozonation on mechanical properties. J Wood Sci 47:24–29

    CAS  Article  Google Scholar 

  14. 14.

    Kelly MW (1977) Critical literature review of relationships between processing parameters and physical properties of particle-board. USDA General Technical Report FPL-10

  15. 15.

    Korai H, Suzuki M (1995) Dimensional stability and dynamic viscoelasticity of double-chemically treated wood (in Japanese). Mokuzai Gakkaishi 41:51–62

    Google Scholar 

  16. 16.

    Kajita H (1987) Oriented particleboard with sugi thinnings (Cryptomeria japonica). I. Effects of degree of particle alignment and board density on physical and mechanical properties. Mokuzai Gakkaishi 33:865–871

    Google Scholar 

  17. 17.

    Shi X, Kajita H, Yano H (1996) Improving the dimensional stability of particleboards by steam pretreatment (in Japanese). J Soc Mater Sci Jpn 45:369–375

    CAS  Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Hideaki Korai.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Korai, H. Effects of low bondability of acetylated fibers on mechanical properties and dimensional stability of fiberboard. J Wood Sci 47, 430–436 (2001). https://doi.org/10.1007/BF00767894

Download citation

Key words

  • Fiberboard
  • Acetylation
  • Bondability
  • Density profile
  • Dimensional stability